HyperDic: atomic_number_1

English > 1 sense of the expression atomic number 1:
NOUNsubstanceatomic number 1, hydrogen, Ha nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas
English > atomic number 1: 1 sense > noun 1, substance
MeaningA nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe.
Synonymshydrogen, H
NarrowertritiumA radioactive isotope of hydrogen
Broaderchemical element, elementAny of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
gasA fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
Substance ofwater, H2Obinary compound that occurs at room temperature as a clear colorless odorless tasteless liquid / liquid
Spanishhidrógeno, número atómico 1
Catalanhidrogen, número atòmic 1

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